31426242020 has 24 divisors (see below), whose sum is σ = 66035491704. Its totient is φ = 12562804736.

The previous prime is 31426242013. The next prime is 31426242037. The reversal of 31426242020 is 2024262413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3654686116 + 27771555904 = 60454^2 + 166648^2 .

It is a super-2 number, since 2×31426242020² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447197 + ... + 512676.

It is an arithmetic number, because the mean of its divisors is an integer number (2751478821).

Almost surely, 2^31426242020 is an apocalyptic number.

It is an amenable number.

31426242020 is an abundant number, since it is smaller than the sum of its proper divisors (34609249684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31426242020 is a wasteful number, since it uses less digits than its factorization.

31426242020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961519 (or 961517 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The spelling of 31426242020 in words is "thirty-one billion, four hundred twenty-six million, two hundred forty-two thousand, twenty".